Lavoisier chose the dead Greek as a fountain from which to draw the elements of his new verbal compounds, assigning to those elements arbitrarily new volumes of meaning, and constructing from them, with no other governing principle than his own judgment of what seemed best, a totally new Language, as it were, adequate to the wants of the new Science. Still, despite these imperfections in the method, the demand, with the growth of the new ideas, for a new expansion of the powers of Language, in a given direction, made the contrivance of the great chemist a successful interpolation upon the speech-usages of the world. It is certainly not therefore inconceivable--because of any governing necessity that Language should be a purely natural growth--that other and greater modifications of the speech of mankind may occur; when--not an arbitrary contrivance upon an imperfect basis and of a limited application is in question, but--when a real discovery, the revelation of the true scientific bases of Language, and limitless applications in all directions, should be concerned. On the other hand, the extent of the practical applications of strictly scientific principles to the Structure of Language is subject to limitation. Even mathematics, theoretically the most unlimited of the existing Sciences, is practically limited very soon by the complexity of the questions involved in the higher degrees of equations. In the same manner, while it may be possible to construct a Scientific Language adequate to all the wants of Language, in which exactness is involved; that is to say, capable of classifying and naming every object and idea in the Universe which is itself capable of exact classification and definition, still there remains an immense sphere, an equal half, it may be said, of the Universe of objects and conceptions, which have not that susceptibility; which are, in other words, so complex, so idiosyncratic, or so vague in their nature, that the best guide for the formation of an appropriate word for their expression is not Intellect or Reflection, but that very Instinct which has presided over the formation of such Languages as we now have. We may accurately define a triangle or a cube, and might readily bring them within the range of a Universal Language scientifically constructed; but who would venture to attempt by any verbal contrivance to denote the exact elements of thought and feeling which enter into the meaning of the verbs _to screech_ or _to twinge_?